{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x99a82f6fb6409ae8bb00e96c708a4a0823d467b3edd73c767ce4dbcf1e01d878",
    "signature": "0xa70d9d3dae40d01d837c647992013ab0d7a906b2afd30773c41ec8f569bc00937a166179e78e2265e426a3bcca23e5f3fc69338b272719d964b420a4f08a7f361b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}